Inhaling apparatus.



- UNITED STATES PATENT 0FFICE.

FRIEDRICH WVANZ AND FRANZ NVANZ, VIENNA, ASTRIA-HUNGARY.

INHALING APPARATU S.

SPECIFICATION forming part of Lefiters Patent N0. 629,833, dated August 1, 1899.

App1ication fi1e March 4, 1898.

T0 all wl'wm it mag co7warn:

Be it known that we, FRIEDRICH WANZ and FRANZ VVANZ, citizens of Austria, residing ab I. Graben 29, Vienna, in theEmpire ofAustria.-Hungary, have invented a certain new am]. useful Improved Mask 01 Inhaling Apparatus for Use in Noxious Atmospheres, of whieh the following is a speeification.

This invention relates 130 an improved mask 01 inha1ing appamlzus for the se of persons whose vocation entails lengthened cohfinemeut in apartments 01 loealities wherein the atmosphere is charged with noxious gases, the

present apparatus being devised after many trials with existing contrivanees.

An inhaler 01 respira.tor constructed aecording to 0111 invention comprises 3 breathing mask 0r vizor whieh ma.y be fitted tightly onto the wearerslhead by means of a pneumatic 01' padded fing in c onjunction with a covering-ring of india-rubber, so as 120 enire1y cover the ace anr1 keep out. the injnrious gases, whi1e the nose and mouth are' left free for ordinary breathing. 113 also comprises means f01 eontrolling respiration, t-he same eonsisting of a gas-tight pouch containin g potash in a solid state and of a chamber eontaining compressed oxygen.

The essential charaeteristic 0f the inven- Lion is filmt owing 110 the employment 0f solid dry eaustic potash the interior of the faee guard 01 mask is eeetually eooled and perspira-tion or the development of vapor prev6nted, the reagent (wibhout the addition 0f any absorbing media or intermediate agents) oifering an extended. srface Whieh greedily attracts am] eombines wit-h the earbonic aeid and moisture 0f the air exha1ed by the wearer. By these mea.ns the temperature of the inte- 1i01 01": the mask is reduced, with the resu1t that the glass of the sight-aperture is never dimmed, while ab the same ti me the mask admits of natural breatshing through ehe nose,

the nose-spring.and smoke-glasses hitherto considered indispen sable in inst'ruments 0f this class bing om'itted 'from the present coushruction.

The cqnsbruction 01: the said apparatus is shown (m the aceomp'anying drawings in whieh- F1 gare 1 shows a perspective view of the apparatus, and Fig. 2 a cross-seetion 0f the same. Fig. 3 shows in a greater me asure a vertical Gut; th1t0ugh the bag for the.reception of the absorbing medium and through the tubes whieh ent er into Ehe same. The valves in the tubes Nos. 10 and 11 are marked 17 311d 18.

The was]: 1 has in frout a g1ass window 2, on the inner side of which is a wiper 3, tham can be turned around 011 che g1ass by means 0f an external button 4 like Lhe pointer of a dial, in order 130 dem the glass 0f condensed moisture from the bre ath. The edge of the niask 1 is 1ined with a cushion 5, which either consists of a eaoutehoue eovering fi11ed Wi'h Wadding or other soft material 01 it is made of. an inflate flexible taube. This eushion serves 110 inclose the face of be wearer in an air-bight manner. T110 air-tight joint is fureher insured by a caoutehouc conical part 17',

eoyering the cushion 5 anti having a neutral opening, which eoni(za1 part isja-rranged so as to press ab its base tight1y against the face of the we'arer when the mztsk is-fitted on.

T0 the mask is attached a hood G, made of gas-tight material, which is made double all laround the 10wer part, so as 1:0 form a c1osed chamber, as shown at 7 and 9. In this 01mmber may be provided in front a partition 9 (shown dotted ab 1 ig. 1) for a purpose 130 be present1y described. The hollow ehamber 0f the hood has smoobh inside surfaces, it being unnecessaryto-provide a 1-arge extent- 0f surface for he purifying 01' absor bing medium.

From the mask 1 project at Lhe front part 7 of the hood. two tubes 10 anc1 11, whieh are provided with va1ves opening in eontrary directions, so as t0 serve as inlet and out1et for the air-Supply to the wearer. Ab a suitable part of the hooc1 a tube 12 enters, the othe1 end of which is connected so a reeeptaele 13, preferably separate frorn the other part of the apparatus and whieh contains compresse. oxygen. the discharge 0f oxygen into the tube 12. 011 Ehe mask 1 arealso provided suraps 01, prefera.bly, elasisie bands 15 for passing around Ehe head in order t0 insure the e10se fit 0f the mask 130 the face.

In the front part 7 0f the 110051, and, if neoessary, also in other parts{isplaced eaustic potash in stieks 01 lumps. For enabling this The valve 14 serves for regulahing.

to be introduced the hoorl has an opening which is closed by bars 16, that are made to nip the sides togebher by n1eans of screws.

When required to be usedthe hood is turned up at the back, so as 110 expose the cushion 5. The mask 1 is then applied so the face and is secured t0 the head by the bands 15, afuer which ehe hood is turned down over 1she head. The exhaled carbnio acid passes into the front par1; 7 of the chzunber, where Ehe caustic potash is situated, Whi0h greedily takes up and combines with the carbonic acid and 'he moisture, am]. thereby also reduces the temperature.

In order 120 prevent the possibility 0f again inhaling any not-absorbed earbonic aoid, the partition 9 may be provided for eausing the carbonic acid to travel a longer distance, as indicated by the arrows, it being made after coming in contaet with he caustic potaslr say on the left-hand side 0'f 'he partitionto pass thence in a baekward direction (to 8) and from the back forward again on 'he ot-her side, Where it is again brought; in contet with causic alkali ab 7 and other places, if necessary. Tl1e oxygen coming from the vesse1 13 mixes With the uncondensed nitrogen in the abzunber 7 8 and passes thence through the inhaling-tube 11 into the mask.

Having thus deseribed the 1mture 0f th1's invention and the best means we know of carrying Ehe same into practical effectwe claim l. In an inhaling apparatus, the cornbinati0n Wih a, mask l, a soft eushion 5,- su rrounding the edge thereof, an annularconical part 17 covering said cushion and adapted 130 fit: at it's base tight against the face, elast sic bands 01 straps for securing the mask 0n the head, a hood attaehed to said mask, havin g a closed ehamber 7, 8, at bottorn, whieh contains materia1 f01 absorbing carbonie acid and moisture, inhaling and. exhaling tubes provided with valves connecting ehe mask wibh -said abzunber, and means for supplying fresh air 01 oxygen in regulated quantity 130 the said chamber 7, S, of the hood, substantially as described.

2. An inhaling apparatus whe rein the mask 0f the hood 6 is provided with a elosing-cushion 5 ant1 elosing annular part 17 fiting c10se against 13118 faee for effeeually cutting 01T the noxious gases from the respiratory organs, in combination with the hollow annular charmber 7, 8 with smooth inner surface into which open firs1: the tubes 10, 11, that pass directly to the n1ask in front of Ehe respiratory 01'- gans, and are provided Wih suitable in1et and oula1et valves, and secondly an air 0r oxygen supply pipe l2,the chamber 7,8, being charged with so]id caustic potash, o1 other suit-able solid substance for combining with carbonic acid, and absorbing moisnure and heat, such substance being situated in the immediate neighborhood of the entering gas and aqueous vapor so as t0 aco effeetually thereon without requiring 110 be spread over extended surfaces, substantially as described.

In testimony whereof we have hereunto set 0u1 hands in presence of owo subseribing witnesses.

FRIEDRICH WANZ. FRANZ TANZ. WVitnesses:

HENRY C. CARPENTER, MARTIN BEROLZHEIMER. 

